Mechanical Engineering Written Exam Questions (GTCL-2010)

Company- Gas Transmission Company Limited (GTCL)
Post- Assistant Engineer-Mechanical
Year- 2010

➦ Explain regeneration of gas turbine with the help of schematic diagram.
➦ Write 3 types of gear. Which are the typical uses of worm gear?
➦ Write down the comparison between  4-strokes & 2-strokes engine.
➦ Differentiate flow in pipe & open channel flow.
➦ Draw the P-V & T-S diagram of Joule-Brayton cycle.
➦ Define Positive Displacement pump.
➦ A eight cylinder I.C Engine has bore X stroke = 75 m X 70 m. Compression ratio =10:1, calculate the volume of combustion chamber & specified the engine.
➦ A pump has suction head =0.4 m, delivery head =14.6 m, Discharge =10 m3/h. To drive the pump you have to select a motor which has efficiency 90%. Calculate the power of the motor.
➦ A vapor compression system has 10 ton capacity, COP=3, what the power required to KW?
➦ A cantilever beam has length 1 m, 15N load is applied in its top. If EI=10 Nm2, What is the maximum deflection?
➦ A thin cylinder has inner diameter = 50 mm, thickness = 2.5 mm, Maximum allowable normal stress = 150 MPa. What will be the internal pressure?
➦ Define Reynolds Number.
➦ Define Mach Number.
➦ Define Nusselts  Number.
➦ Define Prandlts  Number.
➦ Write the Euler's equation for both end clamped. A Euler column of both ends clamped which unsupported length= 1.0 m, stiffness EI=50 Nm2. What is the bulking load?
➦ A spring stiffness 50 KN/m, mass = 3 Kg is hang on spring. Write down the equation of the state, what's the frequency of vibration.